John Perkovich vs. Tyler Robertson — Career Comparison

On the career pitching numbers, Tyler Robertson posted a stronger line than John Perkovich. Tyler Robertson posted stronger numbers in ERA (5.54 vs 7.2) and WHIP (1.500 vs 1.600). By the career numbers, Tyler Robertson had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.